// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/base/touch/selection_bound.h"

#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/geometry/rect.h"

namespace ui {

TEST(SelectionBoundTest, RectBetweenSelectionBounds)
{
    SelectionBound b1, b2;
    // Simple case of aligned vertical bounds of equal height
    b1.SetEdge(gfx::PointF(0.f, 20.f), gfx::PointF(0.f, 25.f));
    b2.SetEdge(gfx::PointF(110.f, 20.f), gfx::PointF(110.f, 25.f));
    gfx::Rect expected_rect(
        b1.edge_top_rounded().x(),
        b1.edge_top_rounded().y(),
        b2.edge_top_rounded().x() - b1.edge_top_rounded().x(),
        b2.edge_bottom_rounded().y() - b2.edge_top_rounded().y());
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));

    // Parallel vertical bounds of different heights
    b1.SetEdge(gfx::PointF(10.f, 20.f), gfx::PointF(10.f, 25.f));
    b2.SetEdge(gfx::PointF(110.f, 0.f), gfx::PointF(110.f, 35.f));
    expected_rect = gfx::Rect(
        b1.edge_top_rounded().x(),
        b2.edge_top_rounded().y(),
        b2.edge_top_rounded().x() - b1.edge_top_rounded().x(),
        b2.edge_bottom_rounded().y() - b2.edge_top_rounded().y());
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));

    b1.SetEdge(gfx::PointF(10.f, 20.f), gfx::PointF(10.f, 30.f));
    b2.SetEdge(gfx::PointF(110.f, 25.f), gfx::PointF(110.f, 45.f));
    expected_rect = gfx::Rect(
        b1.edge_top_rounded().x(),
        b1.edge_top_rounded().y(),
        b2.edge_top_rounded().x() - b1.edge_top_rounded().x(),
        b2.edge_bottom_rounded().y() - b1.edge_top_rounded().y());
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));

    b1.SetEdge(gfx::PointF(10.f, 20.f), gfx::PointF(10.f, 30.f));
    b2.SetEdge(gfx::PointF(110.f, 40.f), gfx::PointF(110.f, 60.f));
    expected_rect = gfx::Rect(
        b1.edge_top_rounded().x(),
        b1.edge_top_rounded().y(),
        b2.edge_top_rounded().x() - b1.edge_top_rounded().x(),
        b2.edge_bottom_rounded().y() - b1.edge_top_rounded().y());
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));

    // Overlapping vertical bounds
    b1.SetEdge(gfx::PointF(10.f, 20.f), gfx::PointF(10.f, 30.f));
    b2.SetEdge(gfx::PointF(10.f, 25.f), gfx::PointF(10.f, 40.f));
    expected_rect = gfx::Rect(
        b1.edge_top_rounded().x(),
        b1.edge_top_rounded().y(),
        0,
        b2.edge_bottom_rounded().y() - b1.edge_top_rounded().y());
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));

    // Non-vertical bounds: "\ \"
    b1.SetEdge(gfx::PointF(10.f, 20.f), gfx::PointF(20.f, 30.f));
    b2.SetEdge(gfx::PointF(110.f, 40.f), gfx::PointF(120.f, 60.f));
    expected_rect = gfx::Rect(
        b1.edge_top_rounded().x(),
        b1.edge_top_rounded().y(),
        b2.edge_bottom_rounded().x() - b1.edge_top_rounded().x(),
        b2.edge_bottom_rounded().y() - b1.edge_top_rounded().y());
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));

    // Non-vertical bounds: "/ \"
    b1.SetEdge(gfx::PointF(20.f, 30.f), gfx::PointF(0.f, 40.f));
    b2.SetEdge(gfx::PointF(110.f, 30.f), gfx::PointF(120.f, 40.f));
    expected_rect = gfx::Rect(
        b1.edge_bottom_rounded().x(),
        b1.edge_top_rounded().y(),
        b2.edge_bottom_rounded().x() - b1.edge_bottom_rounded().x(),
        b2.edge_bottom_rounded().y() - b2.edge_top_rounded().y());
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b1, b2));
    EXPECT_EQ(expected_rect, RectBetweenSelectionBounds(b2, b1));
}

} // namespace ui
